some input please

Currently I have FMS 1.6 pedestal rollers rockers. I just recently went in and tried to adjust my rockers because I was starting to develop a slight ticking, thought maybe one of the rockers came out of spec. I noticed that some of the rockers were getting grooved where the roller tip was rubbing on the inside of the rocker. Kinda looks like the rockers were shifting from side to side for some reason. I heard somewhere that roller rockers only have about a 40k miles life span, anyone else heard this?

Anyway, so now I'm looking into different rockers, and was considering Crane 1.7's. Would this be an OK decision, with my E-cam and other such mods in my sig? You guys think I notice any difference at all, or be just wasting my money?

Thanks, Craig

If it is was i think you are describing.... Sounds like semi-normal wear from some valve float. Maybe some time for Rocker girdles or shaft mounted rockers...

Valve float huh? Before I had the Edelbrock heads, my E7's were floating valves. I had reused the rockers on the new heads, but didn't pay much attention to how they looked.

Could have gotta the wear pattern started on those rockers with the old heads and since you reused them it just carried over. I would try rocker girdles before I spent tons of money on shafts. 1.7's will take you to .529 lift if your cam is .498 with 1.6's. I would suggest Comp pro magnum roller rockers. They are the best I've found.

With 1.7's and the e-cam will be .529" lift. I'm just worried that would be too much and cause piston to valve clearance problems. I am thinking with my 1.90/1.60 valves it should be ok, but if there were 2.02's then I would run into problems. I really don't want to pull my motor all apart to clay the pistons either, I was just hoping someone would know fo sure.

You could run 2.02/1.60's and not have any problems with that cam. Unless you are running insane compression. What piston are you running? What cc are your heads? Are your pistons flycut or do they have valve releifs? Let me know and I'll see what I can figure out, but I personally think you will be just fine. You really dont have to worry too much about piston-valve clearances in the extremes until you are building an interferance motor. Which I dont think you are. 13:1 59cc .721 ect, thats when you should start to wonder about punching holes in your pistons.

Stock pistons with valve releifs.
Heads are 60cc
And I think my compression is 9.2:1

Hey GTStang nice car do you really own it?

No worries HiFlow you can run a huge cam. Just make sure your valve springs can handle the extra .030 lift or so and you will be fine. You wont have any clearance issues.

I met a guy at the All Ford Swap Meet and drag competition at Gateway last week. He is running an E cam w 1.7 rollers w 1.90/1.60 valves. He said he has no clearence problems. Stock block and pistons on a 88 GT.

Oh yeah, the Edel's are good to .575
Thanks guys!

Hey GTStang nice car do you really own it?
Nope, this would be his car.
http://files.automotiveforums.com/gallery/watermark.php?file=/500/6784bobby.JPG
Sorry, bobby

are those bullits i see on a fox? niiiiiice.

LoL yes they are... I have always been a huge fan of the Cragar SS rims. So when Ford did thier version of them with a Mustang Cap I just had to have them though I wasn't sure how they'd look on a Fox. I'm pleased with the look of em. Silver polished Bullits rock on the Fox!

Craig the car doesn't look like that any more.... Right now the whole rear of the car is down to bare metal and rubber. You should come join the sanding fun!!!! LoL

You could run 2.02/1.60's and not have any problems with that cam. Unless you are running insane compression. What piston are you running? What cc are your heads? Are your pistons flycut or do they have valve releifs? Let me know and I'll see what I can figure out, but I personally think you will be just fine. You really dont have to worry too much about piston-valve clearances in the extremes until you are building an interferance motor. Which I dont think you are. 13:1 59cc .721 ect, thats when you should start to wonder about punching holes in your pistons.

Dude.....there is not as much room as you think. Stock 5.0 Pistons with 2.02 valves and any kind of lift plus added duration do not work.

With 1.7's and the e-cam will be .529" lift. I'm just worried that would be too much and cause piston to valve clearance problems. I am thinking with my 1.90/1.60 valves it should be ok, but if there were 2.02's then I would run into problems. I really don't want to pull my motor all apart to clay the pistons either, I was just hoping someone would know fo sure.

There are no for sures when you are looking at .529 lift and 1.90/1.60 valves. If you are not willing to clay your pistons, stick with another set of 1.6's. Sounds like your rockers are just wearing out. If your springs are good for .575 lift, then you are not encountering valve float unless you are trying to turn your motor over 7000RPM's.
Rocker girdles, or a stud conversion will not help anything at all. Pedestals are fine for your combo.

Dude.....there is not as much room as you think. Stock 5.0 Pistons with 2.02 valves and any kind of lift plus added duration do not work.

Not to start a huge debate but when I'm right I'm right and I know I'm right. Stock 5.0 pistons are slightly dished with valve releifs. Even with his 60cc head he is capable of running a .529 lift cam easy. The only valve that goes down as the pistion comes up is the 1.60" exhaust valve. Duration has nothing to do with clearance. Duration is timing and rpm. The lift is the only thing you need to worry about, and there is no way a 1.60 valve is gonna hit a dished piston with valve releifs running a cam like that. I'm sorry but you are wrong. If that where the case then Edelbrock's R&D team is a bunch of dumbasses who dont know a damn thing. Only they are one of the leading performance manufacturers...Hmmm who could be right now? Are you saying that with edelbrock suggesting to run 12.5:1 compression with their Victor Jr. heads which have 2.05/1.60 valves and a .550 minimal lift cam is bullshit? Well then I guess my .621/.627 lift 254/260 @.050 solid roller Comp cam just wont work with my 11.3:1 compression Weisco pistons and Victor Jr. heads now will it? Oh but it does, and it is so wonderfull. Case closed .529 lift, 9.2:1, 60cc, is just fine and dandy and pretty sweet for the street. No Clearance issues whatsoever. No machining needed. Case Closed.

Not to start a huge debate but when I'm right I'm right and I know I'm right. .

You have your information wrong, and I see that you have no first hand experience with factory 302 pistons and large heads/large cams.
Keep to discussing factory 302 pistons, and don't confuse them with Wiseco pistons. Edelbrock heads and Wiseco pistons have no relation whatsoever to factory 5.0 pistons and any head. Compression has zero to do with valve to piston clearance, and yes, duration does effect clearance. Look at a 360 degree cam cycle chart. The longer duration, the longer the valve stays open, and the more of a chance to get close to a piston. A 1.60 exhaust valve will leave very little clearance to a factory 302 piston. The small factory eyebrows are not large enough for a 1.60 valve to get up close and personal.
I personally have clayed 5.0 motors with stock 302 sized exhaust valves up to 1.60 exhaust valves. You would be suprised how quickly you run out of room.
Even Trick Flow recommends claying an engine with their heads which are 2.02/1.60 with any cam other than a stock cam installed straight up.

My point was simply that he will be fine with a .529 lift cam. If you cant run a .529 lift can with stock pistons then how can you run a dome piston with a .700 lift cam? No I dont have alot of experience with stock pistons, I normally scrap them. But I have had more than enough experience with performance heads and cams. Sure my current cam is the largest I have run so far. But I did alot of research before I bought it. I understand that the factory valve refeifs arent much but .529 is not that big. Now dont get me wrong I know that more cam isnt necessarily more power. So dont think I'm some kid reading numbers out of a book, I have built several motors, transmissions, ect. Just got finished with a '84 firebird I have been working on for a friend for the past year.

HiFlow you can run a 1.6 rocker if you want but personally I think you will be fine with a 1.7. Call Summit or Edelbrock since you have their heads and ask them what they think.